HomeMy WebLinkAbout08.a. (Handout)8. a.. CHandaccf) 2010 Annual NPDES Report Board Meeting January 20, 2011 Margaret P. Orr, RE Central Contra Costa SanitarV District 2010 NPDES Annual Report ➢ Total flow treated ➢ Average daily flow ➢ Average dry weather flow ➢ Peak hourly flow ➢ Ash disposal 14.8 billion gallons vs. 14.1 in 2009 40.6 million gallons vs. 38.6 in 2009 = 36.9 million gallons (was 32.5 in 2009) 105 million gallons per day 3,900 tons (wet weight) (for soil amendment) which is the same for 2009. 6w1) 0a I r Treatment Plant ➢ Completed over 15,000 analytical tests ➢ Approximately 11,000 hours of laboratory work ➢ 100 percent compliance with NPDES Permit requirements ➢ NACWA Platinum Award 13th Year! Event Near Permit Limit ➢ Effluent Copper Concentration 12 ug/L November ➢ Permit is 14 ug/L - Monthly Average ➢ QA /QC Review 2 Effluent BOD Concentration ntglL Annual Average 30 25 Monthly Average Limit 25 nWL 20 J a 1s E 10 5 0 2001 2002 2003 2004 2005 2008 2007 2008 2009 2010 Year Effluent TSS Concentration nlglL Annual Average 35 30 Monthly Average Lima 30 melt 25 J 20 a E 15 10 5 0 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 Year Influent Mercury Concentration 11 10 - — - — - — - — - — - — - g — _ — _ — _ — _ _ _ — _ _ _ — _ — _ 9 _ _ — _ — _ _ _ — _ — _ — _ _ _ — Je _ _ — _ _ _ _ _ _ — _ _ _ — _ — _ a y _ _ — _ _ _ — _ _ — _ — _ 3 _ _ — _ _ — _ _ _ _ _ _ _ 2 — - — - - 0 1991 1993 1995 1997 1999 2001 2003 2005 2007 2009 Year .vay.¢iw.a1 ..ea�imo �w.r w= Effluent Mercury Concentration 05 0<5 0, ou 03 J a 925 02 015 01 Om U Monthly Average Llmlt 0.068 ug/L 1991 1993 1995 1997 1999 2001 2003 2005 2001 2009 r Year �.1V6M R1.a . .v 8YfE 11rW �r ML. W., WI El Permit Renewal • Permit expires March 31, 2012 • Renewal Application September 30, 2011 • Dilution Study submitted December 2010 • Chronic Toxicity Testing April - July 2011 • Issues • Copper • Toxicity • Se • PCB • Nutrients 5